Water content is one of the most important parameters when choosing quality contact lens. Moisture retention is another critical factor influenced by the water content of a contact lens. Water content also is an important factor of the various plastics which are used to make soft contact lenses. In the cases of conventional soft contact lenses, higher water content of a contact lenses can let more oxygen pass through the lens to the surface of the eye. So this is important for lens comfort and healthy eyes.However, high water content can be more fragile, so they are more likely to tear with frequent handling. A lot of contact lenses now contain between 50% and 60% water and some contain over 70%. But we cannot say that a high water content…
